Sidewall portion of an automobile tire



FIG. 1 is a perspective view of a sidewall portion of an automobile tire according to my design;

FIG. 2 is a front view thereof;

FIG. 3 is a plane view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a fragmentary enlarged view showing the details of the sidewall portion defined by cross-section by lines A-A and B-B in FIG. 2 thereof; and,

FIG. 9 is an end view taken along line 9-9 in FIG. 8 thereof.

Broken lines in the drawing figures are used to show unclaimed portions of the tire, and thus form no part of the claimed design. 

The ornamental design for a sidewall portion of an automobile tire, as shown and described. 